| 1 | Ostiole tri-radiate or slit-shaped, the upper ostiolar bracts descending |
| 1' | Ostiole circular, the upper ostiolar bracts horizontal |
| 2 | Aperture of the ostiole slit-shaped |
| 2' | Aperture of the ostiole tri-radiate |
| 3 | Lateral veins 9-14 pairs; apex of the peduncle ± dilated; fig receptacle 0.4-1 cm diam. when dry |
| 3' | Lateral veins (12-)15-25(-30) pairs; apex of the peduncle extended into a cupule |
| 4 | Stipules 4-20 cm long; fig receptacle 1-4 cm diam. when dry, mostly ellipsoid |
| 4' | Stipules 1-3 cm long; fig receptacle 0.3-1.2 cm diam. when dry, subglobose |
| 5 | Petiole usually 3-6 cm long. — Flores |
| 5' | Petiole 0.5-2.5 cm long |
| 6 | Periderm of the twigs flaking off; lamina mostly broadest below the middle. — Lesser Sunda Islands |
| 6' | Periderm of the twigs persistent; lamina broadest in the middle. — Moluccas, New Guinea |
| 7 | Stipules connate, 6-25 cm long |
| 7' | Stipules free, up to 6 cm long (on opening shoots sometimes longer) |
| 8 | Internodes conspicuously different in length, the proximal ones of a season’s growth long, subsequently shorter, the ultimate ones very short, sometimes with persistent stipules forming terminal buds |
| 8' | Internodes not conspicuously different in length |
| 9 | Apex of the lamina caudate. — Cultivated, widespread |
| 9' | Apex of the lamina acuminate, mostly shortly so |
| 10 | Major basal lateral veins up to 1/3-1/2 the length of the lamina; cystoliths on both sides of the lamina (in dried material visible as minute pustules); ovary white. — Widespread |
| 10' | Major basal lateral veins 1/10-1/3 the length of the lamina; cystoliths (usually) only beneath; ovaries red(-brown) |
| 11 | Lateral veins 4-7 pairs; margin of upper ostiolar bracts ciliolate. — Widespread |
| 11' | Lateral veins 7-16 pairs; upper ostiolar bracts glabrous (or sparsely puberulous outside) |
| 12 | Stipules (at the apices of leafy twigs) 0.8-1.5 cm long |
| 12' | Stipules (at the apices of leafy twigs) 0.2-0.8 cm long |
| 13 | Epidermis of the petiole (usually) flaking off, at least at the uppermost and/or basal part; peduncle 0.1-0.5 cm long. — Widespread |
| 13' | Epidermis of the petiole persistent; peduncle 0.7-1.5 cm long or at most 0.1 cm long |
| 14 | Peduncle 0.7-1.5 cm long; basal bracts caducous. — Widespread |
| 14' | Peduncle 0-0.1 cm long; basal bracts persistent. — Widespread |
| 15 | Epidermis of petiole usually flaking off, at least at the top of the petiole and/or the base or hairy at the base; waxy gland in dry material in a groove in the base of the midrib; terminal stipules (usually) forming an ovoid (to subglobose) bud; basal bracts caducous, or if persistent, then usually splitting |
| 15' | Epidermis persistent; waxy gland not in a groove at the base of the midrib; basal bracts caducous or remaining entire |
| 16 | Basal bracts persistent and splitting; fig receptacle 0.3-0.5(-0.7) cm diam. when dry; petiole glabrous. — Widespread |
| 16' | Basal bracts caducous; fig receptacle 0.7-1.2 cm diam. when dry, or if smaller, then the base of the petiole hairy. — Moluccas |
| 17 | Basal lateral veins up to 1/5-1/3 the length of the lamina, mostly departing from the midrib at different distances from the base, their bases running parallel to the midrib. — Philippines, Celebes, Moluccas |
| 17' | Basal lateral veins up to 1/10-1/5 the length of the lamina, their bases not running parallel to the midrib |
| 18 | Peduncle 0-0.1 cm long; basal bracts persistent. — Widespread |
| 18' | Peduncle 0.1-0.3(-0.5) cm long; basal bracts caducous. — Malay Peninsula, Borneo, Philippines |
| 19 | Figs pedunculate or sessile with a peduncle-like stipe |
| 19' | Figs sessile |
| 20 | Figs sessile with a peduncle-like stipe (the basal bracts at the base of the stipe) |
| 20' | Figs pedunculate (the basal bracts at the apex of the peduncle) |
| 21 | Tertiary venation subscalariform; various parts often hairy. — New Guinea |
| 21' | Tertiary venation largely parallel to the lateral veins; all parts glabrous. — Sumatra, Malay Peninsula, Borneo |
| 22 | Apex of the peduncle widened into a rim (bearing the basal bracts inside) |
| 22' | Apex of the peduncle not widened into a rim |
| 23 | Midrib of the lamina beneath laterally hairy, often with hairs concentrated in the axils of the lateral veins. — Widespread |
| 23' | Midrib of the lamina beneath with hairs evenly distributed or absent |
| 24 | Fig receptacle subglobose, the basal bracts c. 3 mm long. — Philippines, Celebes, Moluccas, New Guinea |
| 24' | Fig receptacle usually ellipsoid to ovoid, rarely subglobose, the basal bracts 3-11 mm long. — Widespread |
| 25 | Basal bracts (early) caducous |
| 25' | Basal bracts persistent |
| 26 | Basal lateral veins up to 1/10-1/6 the length of the lamina; stipules 1-1.5(-1.7) cm long. — Sumatra, Malay Peninsula, Java, Borneo, Lesser Sunda Islands |
| 26' | Basal lateral veins up to 1/4-1/3(-1/2) the length of the lamina; stipules 0.5-1 (-1.5) cm long. — New Guinea |
| 27 | Fig receptacle 0.4-0.7(-1) cm diam. when dry, the peduncle 0.7-1.2 cm long, 2 upper ostiolar bracts visible, these imbricate; leafy twigs glabrous or sparsely and minutely white puberulous. — Borneo, Philippines, Moluccas, New Guinea |
| 27' | Fig receptacle 0.8-1.2 cm diam. when dry, the peduncle 0.2-0.7 cm long, 3 upper ostiolar bracts visible, these unequal in size and hardly or not imbricate; leafy twigs with dark brown appressed hairs. — Sumatra, Malay Peninsula, Java, Borneo |
| 28 | Lateral and smaller veins (and often also the apex of the midrib) invisible. — Malay Peninsula, Borneo |
| 28' | Lateral veins visible, smaller veins varying from clearly visible to ± obscure |
| 29 | Tertiary venation parallel to the lateral veins (such as in F. elastica); lateral veins departing in wide angles (towards 90°) |
| 29' | Tertiary venation partly to largely parallel to the lateral veins to reticulate towards the margin or reticulate to subscalariform towards the margin; lateral veins usually departing in more acute angles (about 60°) |
| 30 | Fig receptacle ellipsoid, ovoid, or cylindrical; petioles and stipules usually 1.5-3 cm long. — Widespread |
| 30' | Fig receptacle subglobose, or if distinctly longer than wide, then the petioles and/or stipules usually up to 1.5 cm long |
| 31 | Fig receptacle usually 1-1.8 cm diam. when dry; basal bracts 3-8(-10) mm long |
| 31' | Fig receptacle 0.5-1 cm diam. when dry, or if more than 1 cm diam., then the basal bracts 0.5-3 mm long |
| 32 | Basal bracts subequal in size and shape; ostiole closed. — New Guinea |
| 32' | Basal bracts unequal in size and shape; ostiole ± open. — Sumatra, Malay Peninsula, Java, (Philippines) |
| 33 | Stipules 1.5-2.5 cm long; ostiole closed; basal bracts mostly ± connate. — Celebes?, New Guinea |
| 33' | Stipules usually 0.5-1.5 cm long; ostiole ± open; basal bracts free |
| 34 | Midrib (at least in the lower part) of the lamina slightly prominent; petiole, stipules and fig receptacle when dry usually blackish. — Sumatra, Malay Peninsula, Java |
| 34' | Midrib (at least in the lower part) of the lamina slightly impressed; petiole, stipules and fig receptacle when dry usually pale yellowish. — Widespread |
| 35 | Lamina mostly up to 10 cm, rarely up to 15 cm long |
| 35' | Lamina mostly longer than 10 cm, up to c. 20 or up to c. 30 cm |
| 36 | Fig receptacle longer than wide (ellipsoid, obovoid, ovoid, or cylindrical) |
| 36' | Fig receptacle about as long as wide (subglobose) |
| 37 | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 37' | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 38 | Fig receptacle 1.5-2 cm diam. when dry; basal bracts 5-10 mm long. — Widespread |
| 38' | Fig receptacle 0.5-1(-1.2) cm diam. when dry; basal bracts 3-5 mm long. — Borneo |
| 39 | Basal lateral veins up to 1/10-1/4 the length of the lamina |
| 39' | Basal lateral veins up to 1/4-1/3(-1/2) the length of the lamina |
| 40 | Petiole 0.5-1(-1.5) cm long; base of the lamina rounded to obtuse, apex rounded to obtuse to short-acuminate. — Sumatra, Borneo |
| 40' | Petiole 1.5-2.5(-3) cm long; base of the lamina cuneate to obtuse, apex acuminate. — Sumatra, Malay Peninsula, Borneo, Philippines |
| 41 | Stipules distinctly hairy; margin of the lamina not callose towards the base; apex of the lamina acuminate. — Sumatra, Malay Peninsula, Borneo |
| 41' | Stipules glabrous (or sparsely and minutely puberulous); margin of the lamina usually callose towards the base; apex of the lamina rounded to short-acuminate. — Widespread |
| 42 | Indumentum on leafy twigs and stipules brown. — Malay Peninsula |
| 42' | Indumentum absent or, if present, then white |
| 43 | Lower surface of the lamina ± densely puberulous on the veins. — Malay Peninsula |
| 43' | Lower surface of the lamina glabrous, or if hairy, then minutely so and only on the midrib |
| 44 | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 44' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 45 | Basal lateral veins branched, 1/3-1/2 the length of the lamina; margin of the lamina not callose towards the base. — Sumatra, Malay Peninsula, Java, Borneo, Philippines |
| 45' | Basal lateral veins unbranched, mostly up to 1/4 the length of the lamina, or if up to 1/3(-1/2), then the margin of the lamina ± callose towards the base |
| 46 | Ostiole (sub)conical |
| 46' | Ostiole flat, slightly prominent, or slightly sunken |
| 47 | Fig receptacle 0.4-0.7 cm diam. when dry; stipules 0.5-1(-1.2) cm long. — Sumatra, Malay Peninsula, Borneo |
| 47' | Fig receptacle (0.5-)0.7-1.2 cm diam. when dry; stipules (0.5-)1-1.5(-2) cm long. — Sumatra, Borneo |
| 48 | Tertiary and smaller veins of the lamina obscure beneath; stipules 0.5-1 cm long; fig receptacle 0.3-0.4 cm diam. when dry. — Sumatra, Malay Peninsula |
| 48' | Tertiary and smaller veins of the lamina distinct; stipules mostly 1-2 cm long, or if 0.5-1 cm long, then the fig receptacle 0.5-0.8(-1) cm diam. when dry |
| 49 | Basal bracts 3-8(-10) mm long; fig receptacle 0.7-1.3(-1.8) cm diam. when dry |
| 49' | Basal bracts 1-3 mm long; fig receptacle 0.3-0.6(-0.8) cm diam. when dry, basal lateral veins up to 1/4-1/2 the length of the lamina, and/or petioles, stipules, and basal bracts usually glabrous |
| 50 | Basal lateral veins up to 1/10-1/4 the length of the lamina; petioles, stipules, and basal bracts minutely white puberulous; margin of the lamina not callose towards the base. — Sumatra, Borneo |
| 50' | Basal lateral veins up to 1/4-1/3(-1/2) the length of the lamina; petioles, stipules, and basal bracts usually glabrous; margin of the lamina ± callose towards the base. — Widespread |
| 51 | Petioles and stipules usually 0.5-1 cm long; basal lateral veins usually 1/4-1/2 the length of the lamina |
| 51' | Petioles and stipules usually 1-2 cm long; basal lateral veins usually 1/10-1/4, sometimes in F. rigo up to 1/3, the length of the lamina |
| 52 | Basal bracts 2-3 mm long; apex of the lamina short-acuminate (with an obtuse acumen) to obtuse to subacute to rounded. — Widespread |
| 52' | Basal bracts 1.5-2 mm long; apex of the lamina usually acuminate to subcaudate. — Sumatra, Malay Peninsula, Borneo |
| 53 | Basal bracts 1-2 mm long; apex of the lamina acuminate. — Sumatra, Malay Peninsula, Java, Borneo |
| 53' | Basal bracts 2-3 mm long; apex of the lamina rounded to obtuse. — New Guinea |
| 54 | Indumentum of leafy twigs, petioles, and stipules (usually) brownish; basal bracts c. 2 mm long. — Borneo |
| 54' | Indumentum of leafy twigs, petioles, and stipules absent or whitish, or if brownish, then the basal bracts 3-5(-10) mm long |
| 55 | Stipules and/or petioles usually 0.5-1 cm long; apex of the lamina rounded to obtuse or to subacute to short-acuminate, the acumen obtuse; basal bracts 0.5-4 mm long |
| 55' | Stipules and petioles usually 1-1.5 cm long, or up to 3 or 4 cm long, resp.; apex of the lamina acuminate, or if rounded to obtuse and basal bracts 2-3 mm long, then only occurring in New Guinea or the basal bracts 4-8(-10) mm long |
| 56 | Tertiary venation (nearly) invisible. — Malay Peninsula, Borneo |
| 56' | Tertiary venation visible |
| 57 | Fig receptacle with internal hairs; midrib of the lamina flat to slightly prominent or impressed above; acumen of the lamina obtuse. — Widespread |
| 57' | Fig receptacle without internal hairs; midrib of the lamina impressed above; acumen of the lamina usually acute. — Sumatra, Malay Peninsula, Java, Borneo, Philippines, Celebes? |
| 58 | Basal bracts 2-3 mm long. — New Guinea |
| 58' | Basal bracts 3-8(-10) mm long |
| 59 | Apex of the lamina acuminate, the acumen usually acute; margin of the lamina not callose. — Sumatra, Malay Peninsula, Java, Borneo, Philippines, Celebes? |
| 59' | Apex of the lamina rounded to short-acuminate, the acumen usually obtuse; margin of the lamina ± callose towards the base. — Widespread |
| 60 | Fig receptacle longer than wide |
| 60' | Fig receptacle about as long as wide (or wider than high) |
| 61 | Fig receptacle 2-3.5 cm diam. when dry |
| 61' | Fig receptacle 0.3-2 cm diam. when dry |
| 62 | Apex of lamina rounded; basal lateral veins mostly up to 1/3-1/2 the length of the lamina. — Sumatra, Malay Peninsula, Borneo |
| 62' | Apex of lamina acuminate (to obtuse); basal lateral veins mostly 1/8-1/3 the length of the lamina |
| 63 | Stipules 1-1.5(-2) cm long; (main) basal lateral veins often branched, often 1-3 pairs of smaller lateral veins below the main ones; base of the lamina cordate to rounded; basal lateral veins 0.5-4 mm long |
| 63' | Stipules (1.5-)2-4 cm long; basal lateral veins unbranched, usually without smaller lateral veins below the (main) ones; base of the lamina rounded to cuneate, or cordate, then the basal bracts 10-20(-30) mm long |
| 64 | Stipules brownish (woolly) tomentose to subvillous or glabrous; fig receptacle glabrous inside. — Widespread |
| 64' | Stipules sparsely to densely yellowish sericeous; fig receptacle hairy inside, on the inner surface or also on the pedicels. — Philippines, Celebes |
| 65 | Lateral veins (8-)12-20 pairs; basal lateral veins up to 1/20-1/10 the length of the lamina. — Widespread |
| 65' | Lateral veins 8-12 pairs; basal lateral veins up to 1/8-1/3(-1/2) the length of the lamina |
| 66 | Basal bracts 8-10 mm long, ovate to elliptic, the apex obtuse; tertiary venation partly parallel to the lateral veins. — Sumatra |
| 66' | Basal bracts 10-20(-30) mm long, semicircular to suborbicular, the apex rounded. — Java, Borneo |
| 67 | Fig receptacle 1-2 cm diam. when dry |
| 67' | Fig receptacle 0.3-1 cm diam. when dry |
| 68 | Indumentum (partly) set(ul)ose with irritating hairs |
| 68' | Indumentum not set(ul)ose |
| 69 | Basal bracts 0.5-3 mm long |
| 69' | Basal bracts 3-18 mm long |
| 70 | Stipules 1-1.5(-2) cm long; base of the lamina cordate to rounded. — Widespread |
| 70' | Stipules 2-4 cm long; base of the lamina rounded or to subattenuate |
| 71 | Basal lateral veins curved, usually running close to the margin, unbranched; ostiole closed, the 3 upper ostiolar bracts clearly imbricate. — Malay Peninsula |
| 71' | Basal lateral veins straight or slightly curved, branched; ostiole ± open, the 3 upper ostiolar bracts not or slightly imbricate. — Widespread |
| 72 | Petiole 0.5-1(-1.5) cm long, 1-2 mm thick |
| 72' | Petiole 1.5-5.5 cm long, 2-3(-5) mm thick |
| 73 | Basal bracts 3-5 mm long; fig receptacle 0.5-1.2 cm diam. when dry. — Sumatra, Borneo |
| 73' | Basal bracts 5-8 mm long; fig receptacle 1.5-2 cm diam. when dry |
| 74 | Ostiole ± open, the 3 upper ostiolar bracts not or slightly imbricate; lateral veins 5 or 6 (or 7) pairs; stipules yellowish to whitish sericeous to puberulous. — Sumatra, Malay Peninsula |
| 74' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate; lateral veins 7-12 pairs, or if less, then the stipules glabrous or minutely white puberulous |
| 75 | Basal bracts 10-18 mm long, covering 1/2-3/4 the length of the receptacle |
| 75' | Basal bracts usually 4-10 cm long, covering up 1/3(-1/2) the length of the lamina |
| 76 | Apex of lamina acuminate, the acumen acute; basal bracts broadest below the middle, the apex often obtuse. — Java |
| 76' | Apex of lamina short-acuminate, the acumen obtuse; basal bracts broadest above the middle, the apex rounded. — Celebes, Moluccas, New Guinea |
| 77 | Midrib (and lateral veins) ± impressed above; stipules brownish to whitish sericeous to puberulous; base of lamina mostly (sub)cordate with a narrow sinus. — Malay Peninsula, Borneo, Philippines |
| 77' | Midrib (and lateral veins) slightly prominent to flat or the midrib sometimes slightly impressed; stipules glabrous or white (minutely) puberulous; base of lamina mostly cuneate to rounded |
| 78 | Apex of lamina acuminate, the acumen acute; basal bracts broadest below the middle, the apex often obtuse; areoles of lamina obscure beneath. — Widespread |
| 78' | Apex of lamina short-acuminate, the acumen obtuse; basal bracts broadest above the middle, the apex rounded; areoles of lamina usually distinct beneath because of prominent veinlets. — Celebes, Moluccas, New Guinea |
| 79 | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 79' | Ostiole ± open, the 3 upper ostiolar bracts not or partly imbricate |
| 80 | Basal bracts semicircular to suborbicular, imbricate, the apex rounded; areoles of lamina usually distinct beneath because of prominent veinlets. — Eastern Malesia |
| 80' | Basal bracts ovate, not (or only basally) imbricate, the apex obtuse; areoles of lamina obscure beneath. — Widespread |
| 81 | Basal lateral veins branched; lateral veins (3-)4-6 pairs. — Sumatra, Malay Peninsula, Java, Borneo, Philippines |
| 81' | Basal lateral veins (usually) unbranched; lateral veins 6-12 pairs |
| 82 | Basal lateral veins 1/4-1/3(-1/2) the length of the lamina; apex of lamina rounded to short-acuminate, the acumen obtuse; leafy twigs, petioles and stipules usually glabrous. — Philippines |
| 82' | Basal lateral veins up to 1/10-1/4 the length of the lamina; apex of lamina acuminate, or if short-acuminate to rounded, then the leafy twigs, petioles and stipules puberulous |
| 83 | Fig receptacle ellipsoid. — Sumatra, Malay Peninsula, Borneo, Philippines |
| 83' | Fig receptacle ovoid. — Sumatra, Borneo |
| 84 | Fig receptacle 1-2 cm diam. when dry |
| 84' | Fig receptacle 0.3-1 cm diam. when dry |
| 85 | Indumentum on various parts (as leafy twigs and midrib of the lamina beneath) brown floccose-tomentose |
| 85' | Indumentum not floccose-tomentose |
| 86 | Apex of the fig receptacle concave, the ostiole sunken; stipules 2-6 cm long, subpersistent. — Sumatra, Malay Peninsula |
| 86' | Apex of the fig receptacle convex to submammillate, the ostiole ± prominent; stipules 1-2 cm long, mostly caducous. — Sumatra, Malay Peninsula, Java, Borneo |
| 87 | Basal bracts 0.5-3 mm long |
| 87' | Basal bracts (3-)4-10(-18) mm long |
| 88 | Midrib impressed above; areoles of the lamina conspicuous beneath. — Malay Peninsula |
| 88' | Midrib slightly prominent to flat (or slightly impressed towards the base); areoles of the lamina obscure |
| 89 | Apex of lamina acuminate; petiole 2-5 cm long. — Borneo |
| 89' | Apex of lamina rounded (to obtuse); petiole (0.5-)1-2(-3) cm long. — Sumatra?, Malay Peninsula |
| 90 | Lamina on the midrib above and the midrib and lateral veins beneath white puberulous; base of the lamina cordate to rounded. — Cultivated |
| 90' | Lamina above and beneath glabrous or sometimes minutely puberulous on the midrib beneath; base of the lamina cuneate to rounded |
| 91 | Midrib (at least the lower part) impressed above; base of lamina cordate to rounded. — Borneo |
| 91' | Midrib of lamina slightly prominent to flat; base of lamina usually cuneate to rounded |
| 92 | Basal bracts semicircular to suborbicular with a rounded apex, imbricate, covering 1/3-2/3 of the receptacle. — Widespread |
| 92' | Basal bracts (broadly) ovate, not (or only basally) imbricate with an obtuse to acute or to rounded apex, covering up to 1/3 (or 1/2) of the receptacle |
| 93 | Apex of the lamina acuminate, usually with an acute acumen; basal bracts ovate, not or only imbricate at the base. — Widespread |
| 93' | Apex of the lamina rounded to obtuse, or if acuminate, then with an obtuse acumen; basal bracts semicircular to broadly ovate, ± imbricate |
| 94 | Base of the lamina and the lower part of the margin not (or hardly) callose; smaller veins of the lamina, even the reticulum ± clearly visible beneath; basal bracts usually covering 1/2 or more of the fig receptacle. — Widespread |
| 94' | Base of the lamina and (at least) the lower part of the margin ± distinctly callose; smaller veins of the lamina usually not clearly visible to obscure; basal bracts covering up to 1/2 of the fig receptacle |
| 95 | Lateral veins 6-10 pairs; apex of the lamina (usually) short-acuminate. — Widespread |
| 95' | Lateral veins 10-13 pairs; apex of the lamina (usually) rounded. — Sumatra?, Malay Peninsula |
| 96 | Basal bracts 0.5-2.5(-3) mm long |
| 96' | Basal bracts 3-8(-10) mm long |
| 97 | Ostiole open, the 3 upper ostiolar bracts not or slightly imbricate |
| 97' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 98 | Lamina ± densely puberulous on the veins beneath. — Malay Peninsula |
| 98' | Lamina glabrous beneath |
| 99 | Stipules glabrous. — Sumatra, Malay Peninsula, Java, Borneo |
| 99' | Stipules yellowish sericeous. — Malay Peninsula |
| 100 | Basal lateral veins up to 1/20-1/10 the length of the lamina; apex of the lamina short-acuminate. — Sumatra, Malay Peninsula, Java, Borneo, Philippines |
| 100' | Basal lateral veins up to usually 1/4-1/3 the length of the lamina; apex of the lamina usually rounded. — Sumatra?, Malay Peninsula |
| 101 | Indumentum on various parts (as stipules and midrib of the lamina beneath) brown floccose-tomentose. — Sumatra, Malay Peninsula, Java, Borneo |
| 101' | Indumentum not floccose-tomentose |
| 102 | Leafy twigs (and often also on other parts) with abundant small dark brown appressed hairs; tertiary venation ± prominent beneath |
| 102' | Leafy twigs without such hairs or if present, then very sparse and inconspicuous; tertiary venation (almost) flat beneath |
| 103 | Petiole 0.5-1 cm long; apex of the lamina rounded; tertiary venation of the lamina slightly prominent (rather inconspicuous). — Java, Borneo (southern) |
| 103' | Petiole (0.5-)1-2.5 cm long; apex of the lamina acuminate to rounded; tertiary venation prominent (and conspicuous). — Sumatra, Malay Peninsula, Borneo |
| 104 | Ostiole ± open, the upper 3 ostiolar bracts not or partly imbricate |
| 104' | Ostiole closed, the 3 upper ostiolar bracts clearly imbricate |
| 105 | Basal lateral veins up to 1/10-1/4 the length of the lamina |
| 105' | Basal lateral veins up to 1/4-1/2 the length of the lamina |
| 106 | Fig receptacle 0.3-0.6 cm diam. when dry; basal bracts 1-2 mm long. — Sumatra, Malay Peninsula, Java, Borneo |
| 106' | Fig receptacle (0.5-)0.7-1.2 cm diam. when dry; basal bracts 3-5 mm long. — Sumatra, Borneo |
| 107 | Lateral veins 6-10 pairs, the basal pair unbranched, sometimes faintly branched. — Widespread |
| 107' | Lateral veins (3-)4-6 pairs, the basal pair branched. — Widespread |
| 108 | Lateral veins 10-13 pairs. — Sumatra?, Malay Peninsula |
| 108' | Lateral veins (3-)4-8(-9) pairs |
| 109 | Basal bracts 3-5 mm long; apex of the lamina rounded. — Java, Borneo (southern) |
| 109' | Basal bracts 5-8 mm long; apex of the lamina acuminate |
| 110 | Base of lamina auriculate to cordulate; fig receptacle depressed-globose. — Java |
| 110' | Base of lamina cuneate to rounded; fig receptacle subglobose to ovoid to ellipsoid to obovoid. — Widespread |
